C-value TreadANALYSIS-005

Inputs

• Build ResultBRDThe built bowl from Stand 3D Plus - or Rail 3D's Rail Result, which carries it. Merge several into one branch and they are checked as one bowl
• Rail ResultRLDRailings from Rail 3D - their exact built tops, the front row's included. Unwired, railings are not checked (orange warning) - the first row and the seats behind railings get no railing value. Merge several to match the bowls above
• Focal CurveFocal CThe line every band aims at. Wire Field's Focal Curve, or draw your own
• Color SchemeSchemeA scheme from C-value Legend - it decides the colors and prints on every sheet. Unwired, the code's four steps are used and no legend prints
• Focal Aim Mode▾ AimWhich point on the pitch each band is measured against. THROUGH_CORNER walks the boundary to the first point the row in front hides, so corners come out right on a closed bowl. PERPENDICULAR takes the point straight ahead of the band's section, at the focal line's real height - use it on open stands and on a focal line that rises and falls, like a ballpark's infield to outfield (default THROUGH_CORNER)
• Minimum C-ValueMin CBands below this are POOR. Leave it empty to judge each tier by the value its section was designed for (Table Section min_c_value, Auto Section Minimum C-Values; 90 mm if the section has none). 60 mm tolerable, 90 mm good, 120 mm excellent
• Optimal C-ValueOpt CUpper end of the published band. Bands above it are drawn blue (default 120 mm)
• Tier EnabledTiersWhich tiers to build - one per tier, empty = every tier (default true)
• Rail CheckRail ChkCount railings and vomitory walls as sightline obstructions - the walls come with the build result, so they count without Rail Result too. Off = ignore them all, as if none were built (default on)
• Panel ValuesPanelEvery value from Input Panel, as one bundle. Anything you wire in yourself wins over it

Outputs

• C-value Map DataCMD ⊞The whole tread map flattened to 2D plan. Feed it to C-value Map for sheets
• C-value Section DataCSD ⊞Every axis section in one bundle. Feed it to C-value Section Check for sheets
• Map HatchesHatchesOne branch per tier. One hatch per tread cell - the tread between two axes, in one row
• Cell ColorsColorsOne branch per tier. Wire into Custom Preview to override how the map is drawn
• Cell OutlinesOutlinesOne branch per tier. Check here that the cells break on the axis lines
• Band C-ValuesBand COne branch per tier. Negative means the view is cut, NaN means no value
• Band StatusesStatusOne branch per tier. OK / POOR / BLOCKED / FRONT / EMPTY / NA - EMPTY is a row cell with no seat in it, so nothing is measured there
• Band SectionsSectionsOne branch per tier. The section actually measured - the evidence behind the colors
• Band EyesEyesOne branch per tier. The notional eye each band value was measured from
• Band FocalsFocalsOne branch per tier. The focal point each band value was measured to
• Effective Focal CurvesEff FocalOne branch per tier. The same curve C-value Seat draws, built from band focals
• SightlinesSightlnsOne branch per tier. The section being measured, drawn
• ReportReportPer-tier summary plus how well one section represents each band
• DebugDebugDeveloper diagnostic output for tracking down bugs. Copy this when reporting a problem

What it does

Railings - vomitory walls included - count the same way as in C-value Seat: whichever of the row in front and a railing leaves the least clearance sets the cell's value, a railing the view clears by more than Optimal C-Value does not count while there is a row in front, a railing on another tier whose lowest tread is higher than the sightline is overhead and left out, and near a corner a railing that blocks the view to a focus outside the field counts only if it also blocks the view to the nearest point of the field. In the front row, with nothing else in front, a railing or wall of the cell's own tier sets the value whatever the clearance; one of another tier counts only when the view clears it by less than Optimal C-Value. Where a vomitory opening takes up the middle of a band, the band's front row is measured at the nearest seats of that row rather than over the open passage, against the railing built in front of them. Where a band's center line crosses none of the treads a cut has left in a tier, that tier's cells in the band are NA - no value - rather than a value measured where there is no tread, and the band's section leaves that tier out; a white remark lists those bands, and C-value Seat still gives every seat there its own value.